1. Department of Physics, Western Michigan University, Kalamazoo, Michigan 49008, USA
2. School of Mathematics and Physics, Queen's University Belfast, Belfast BT7 1NN, Northern Ireland, United Kingdom
3. Aeronautics and Aerospace Engineering, Hasan Kalyoncu University, 27100 Gaziantep, Turkey
4. Department of Physics, University of Strathclyde, Glasgow G4 0NG, Scotland, United Kingdom
5. Department of Physics and Astronomy, Georgia State University, Atlanta, Georgia 30303, USA
6. Columbia Astrophysics Laboratory, Columbia University, New York, New York 10027, USA